As DBAs, we are asked all sorts of impossible questions. Who dropped that important table last month? Why was everything slow last week? Who made that user a sysadmin? You’d have to be a mind reader to know the answers to some of those, right? Not necessarily! SQL Server can help you find information about these and other common problems with its default trace and system_health Extended Events session, but you have to know how to collect and interpret the data they provide. In this session, we’ll explore what system_health and the default trace are, what information they contain, and how to use them to find the answers you’re searching for.